687822228786 has 32 divisors (see below), whose sum is σ = 1715089195008. Its totient is φ = 178655124240.

The previous prime is 687822228733. The next prime is 687822228787.

687822228786 is nontrivially palindromic in base 10.

It is a super-4 number, since 4×687822228786⁴ (a number of 48 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (687822228787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 744395890 + ... + 744396813.

It is an arithmetic number, because the mean of its divisors is an integer number (53596537344).

Almost surely, 2^687822228786 is an apocalyptic number.

687822228786 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

687822228786 is an abundant number, since it is smaller than the sum of its proper divisors (1027266966222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687822228786 is a wasteful number, since it uses less digits than its factorization.

687822228786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488792726.

The product of its digits is 115605504, while the sum is 66.

The spelling of 687822228786 in words is "six hundred eighty-seven billion, eight hundred twenty-two million, two hundred twenty-eight thousand, seven hundred eighty-six".